Scrolling through components zooms out - UI problem

Not sure if this is 4.0 beta specific or also in 3.0, but scrolling down in the components window also enables zooming out of the node structure, which is an annoying UI bug. Scrolling up doesn't zoom in, so only scrolling down is screwed up. You might already know about this, but it seems like an easy fix for version 4.

EDIT: It is zooming in because the component window is overlayed on the window interface, which is a problem.